163 
Hab. Chiriqui near David, province of Veragua, at an altitude of 
from 2000 to 3000 feet. 
This is a remarkable species, differing, as it does, from all other 
Humming-Birds with which I am acquainted, in the large amount of 
white on the tail-feathers, which shows very conspicuously when that 
organ is spread. In form it is very similar to the 7’. brevirostris and 
T. longirostris of the Brazils. 
3. TrocuiLus (THALURANIA) VENUSTA. 
The entire crown, back of the neck, and upper part of the back, 
shoulders, abdomen, and under tail-coverts, beautiful shining ultra- 
marine blue; throat and fore-part of the neck rich metallic green ; 
wings purplish black ; tail considerably forked, and of a blackish 
blue; bill black. 
Total length, 4 inches; bill, 2; wing, 21; tail, 14. 
Hab, Volcano of Chiriqui in Veragua. 
Remark.-—Nearly allied to, and of the same form and size as, the 
T. furcatus, but a far finer bird. 
4. TRocuiLvus ( ?) CHRULEOGULARIS. 
Male: upper surface, shoulders, abdomen and under tail-coverts, 
shining grass-green ; throat, sides of the neck and chest, rich violet- 
blue; wings purple-brown; tail rather forked; central feathers 
bronzy green; lateral feathers purplish black ; upper mandible and 
tip of the lower black ; basal portion of the latter fleshy white. 
Female: upper surface shining grass-green, but of a paler hue 
than in the male ; tail as in the opposite sex, except that the lateral 
feathers are tipped with white ; centre of the throat, abdomen and 
under tail-coverts white. 
Total length, 33 inches ; bill, 3; wing, 2; tail, 12. 
Hab. Near David, on the north side of the Cordillera, Veragua. 
I am also indebted to Dr. T. B. Wilson of Phiiadelphia for the 
loan of a specimen from Panama. This species is precisely of the 
same elegant form as the 7. Gowdotii, but is of a larger size, and is 
at once distinguished from that bird by its blue breast. 
5. Trocur.us ( ?) CASTANEOVENTRIS. 
Crown of the head metallic green; upper surface green ; wings 
purplish brown ; tail dark bronzy green, crossed near the tip by a 
broad band of black ; the lateral feathers tipped with buff, which de- 
creases in extent as the feathers approach the central ones; all the 
under surface reddish chestnut ; bill black. 
Total length, 4 inches; bill, 2; wing, 21; tail, 13. 
Hab. Cordillera of Chiriqui, at an altitude of 6000 feet. 
Remark.—This is a moderately sized species, and is not allied to 
any other member of the family with which I am acquainted; I am 
therefore unable to assign it a place in any of the sections hitherto 
proposed ; the specimens I possess appear to be immature, and are 
unfortunately in bad condition. 
